How do gross rent, net-effective rent, and concessions compare?
Answer: Gross rent is the monthly rent written into the lease before discounts. A concession is free rent or a credit. Net-effective rent spreads that concession across the lease term: gross rent multiplied by paid months, divided by total months. At $3,600 gross with one free month on a 12-month lease, net effective is $3,300—but payments, security deposit, and renewal pricing may still use $3,600.
The three terms
| Term | Meaning | What to verify |
|---|---|---|
| Gross rent | Monthly lease rent before a temporary discount | The amount stated in the lease and used for payments |
| Concession | Free rent, a one-time credit, or another discount | Amount, timing, conditions, and repayment clauses |
| Net-effective rent | Marketing calculation that averages the concession over the term | The formula and whether you can actually budget that average |
“Net effective” is not automatically the amount you pay each month. Some leases charge the gross rent every month and apply one free month or a credit separately. Others spread the discount. The signed lease and concession rider control the payment schedule.
Calculate it correctly
For free months:
Net-effective rent = gross monthly rent × paid months ÷ total lease months
Example: a 12-month lease at $3,600 gross with one free month has 11 paid months.
| Calculation | Result |
|---|---|
| Total gross obligation before concession | $43,200 |
| One-month concession | −$3,600 |
| Total after concession | $39,600 |
| Net effective over 12 months | $3,300/month |
For a fixed credit, subtract the credit from the total gross rent and divide by the full lease term.
Questions to ask before signing
- What exact monthly rent appears in the lease?
- Is the concession written into the lease or a signed rider?
- Which month is free, or when is the credit applied?
- Can the landlord reclaim the concession after a late payment or early termination?
- Is the security deposit based on gross rent?
- What rent will a renewal increase start from?
Important caveats
Renewal risk
A temporary concession can expire. If a market-rate apartment renews from the higher gross amount, the increase from your effective first-year cost can feel much larger than the advertised percentage. Compare apartments on both first-term effective cost and the gross lease rent.
Rent-stabilized apartments
Do not assume “net effective,” “preferential rent,” and “free month” are interchangeable. HCR defines preferential rent as rent an owner agrees to charge below the legal regulated rent. Since 2019, tenants paying a preferential rent generally retain it for the tenancy, subject to lawful increases, but program-specific exceptions exist. Confirm how the legal rent, preferential rent, and any separate concession appear in the HCR rider and lease.
Cash flow
Even when the arithmetic is accurate, it may hide the actual schedule. Budget from the payments due under the lease, not from the headline alone.
Primary sources
- HCR: Preferential rent, leases, and security deposits
- HCR: Rent increases and rent overcharge
- HCR: NYC Rent Stabilization Lease Rider
- New York Attorney General: Residential Tenants' Rights Guide
This page explains the arithmetic and common lease structures; it is not a determination of the legal rent for a particular apartment.
Compare the real monthly obligation
RentReboot alerts show listing prices from the source. Before applying, open the listing and confirm whether the advertised figure is gross or net effective.